As a unit rate, 137.5 miles in 2.5 hours would be
5.5 miles per hour
55 miles per hour
137 miles per 2 hours
343.75 miles per hour

Anyone know? will mark brainliest if correct!

Hiroaki wants to find 3 3/4 - 7/8 explain why he must rename 3 3/4 to do the subtraction.

Do one of the following, as appropriate: (a) find the critical value z subscript alpha divided by 2 , (b) find the critical value t subscript alpha divided by 2 . 99%; nequals 17; sigma is unknown; population appears to be normally distributed.